Electric slide valve switch control device

Abstract

The present invention relates to the technical field of oil exploration and development, and is an electric slide valve switch control device, including an ash discharge nipple, a nipple joint, a piston locking mechanism and a control nipple, wherein the lower end of the ash discharge nipple is connected to the upper end of the control nipple through a nipple joint, and at least one ash discharge port connected inside and outside is evenly distributed along the circumferential direction in the middle of the ash discharge nipple, and a control rod with an upper end located above the ash discharge port is provided in the nipple joint, and an ash discharge piston is clamped on the upper end of the control rod through a piston locking mechanism, and a driving device is provided in the control nipple that can unlock the piston locking mechanism after the control rod is actuated to allow the ash discharge piston to fall. The present invention has a reasonable and compact structure, and controls the device to reach the desired ash discharge position through the signal fed back by the depth calibration nipple, and controls the motor to work through the ground controller, and the piston locking mechanism is unlocked after the motor drives the control rod to move downward, and then the ash discharge piston falls freely by its own weight and the weight of cement, and at this time, the cement can flow out from the ash discharge port to perform ash discharge work.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum exploration and development, and is an electric slide valve switch control device. Background Art

[0002] During oilfield exploration and development, the sealing techniques required for permanent formation sealing operations include cement plugs, bridge plugs and cable ash injection. The cable ash injection sealing technique is widely used in the formation sealing technology of major domestic oil fields due to its characteristics of short construction period, accurate ash injection amount, precise positioning and low cost. However, the traditional cable ash injection sealing technique often uses detonators for blasting ash injection and impact ash injection, but these two ash injection methods have the following problems: cable blast ash injection uses pyrotechnics such as detonators, which poses safety risks in transportation, use and management. The impact type is only suitable for single impact ash injection and cannot be applied to more than two ash injections. Summary of the invention

[0003] The present invention provides an electric slide valve switch control device, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the safety hazards and multiple ash-adding problems of the traditional ash-adding method.

[0004] The technical solution of the present invention is achieved through the following measures: an electric slide valve switch control device, including an ash discharge short section, a short section joint, a piston locking mechanism and a control short section, the lower end of the ash discharge short section and the upper end of the control short section are connected together through a short section joint, and at least one ash discharge port connected inside and outside is evenly distributed along the circumferential interval in the middle part of the ash discharge short section, a control rod with an upper end located above the ash discharge port is provided in the short section joint, an ash discharge piston is clamped on the upper end of the control rod through the piston locking mechanism, and a driving device is provided in the control short section, which can unlock the piston locking mechanism after the control rod is actuated to allow the ash discharge piston to fall.

[0005] The following are further optimizations and / or improvements to the above technical solutions:

[0006] The above-mentioned piston locking mechanism may include a guide tube, a piston pressure cap and a steel ball. The lower end of the control rod is located on the inner side of the short joint and is connected to a driving device that can move the control rod up and down. The middle part of the control rod is provided with a guide tube whose lower end is fixedly connected to the short joint. At least two ball holes that are connected inside and outside are symmetrically arranged along the circumferential direction on the outer side of the upper part of the guide tube corresponding to the position above the ash discharge port. A limiting steel ball that abuts against the outer side of the upper part of the control rod is arranged in the ball hole. Each steel ball contacts the lower side of the ash discharge piston after protruding from the ball hole. A piston pressure cap is fixed to the upper end of the guide tube corresponding to the position above the ash discharge piston.

[0007] The ball hole can be a tapered hole with a larger inner portion and a smaller outer portion, and the outer side of the upper portion of the ash discharge piston is a tapered surface with a smaller upper portion and a larger lower portion.

[0008] The above-mentioned short section joint may have a first mounting hole and a second mounting hole connected in sequence from top to bottom, the inner diameter of the first mounting hole is smaller than the inner diameter of the second mounting hole, the inner side of the first mounting hole is fixedly connected to the outer side of the lower end of the guide tube, the control rod is in an inverted "T" shape, the upper part of the control rod passes through the second mounting hole and the first mounting hole in sequence and is then sleeved on the inner side of the guide tube, and at least one limiting groove that passes through the upper and lower parts and opens outward is distributed circumferentially at intervals on the outer side of the lower part of the control rod, a screw hole that is connected inside and outside is provided on the outer side of the short section joint corresponding to the position of the limiting groove, and a limiting screw with an inner end located in the limiting groove is provided in the screw hole.

[0009] The driving device can be a motor with a sealed lower portion fixedly mounted in the control nipple, a threaded hole is provided in the center of the lower end of the control rod, and the upper end of the output shaft of the motor is threadedly connected to the threaded hole after passing through the second mounting hole.

[0010] The lower end of the control short section may be connected to an electronic plug, the lower end of the electronic plug is connected to a depth adjustment short section, and the lower end of the depth adjustment short section is connected to a lower joint.

[0011] The above may also include a faucet, an ash cylinder short section and a ground controller for controlling the operation of the driving device. The ground controller is electrically connected to the faucet through a cable. At least one ash cylinder short section is connected between the faucet and the ash discharge short section from top to bottom.

[0012] The present invention has a reasonable and compact structure. The depth calibration short section can be used for depth calibration, thereby judging the downhole depth of the device, thereby controlling the desired ash discharge position. The motor is controlled by a ground controller, and the motor drives the control rod to move downward, and then the piston locking mechanism is unlocked. Then, the ash discharge piston falls freely by its own weight and the weight of cement. At this time, the cement can flow out from the ash discharge port to perform the ash discharge work. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 It is a schematic diagram of the main structure of the present invention.

[0014] Attached Figure 2 It is a schematic diagram of a partially enlarged cross-sectional structure of the ash discharge short section in the present invention.

[0015] Attached Figure 3 For attachment Figure 2 Schematic diagram of the cross-sectional structure when the middle ash discharge piston moves to the lower end.

[0016] The codes in the accompanying drawings are: 1 is the ash discharge short section, 2 is the short section joint, 3 is the control short section, 4 is the ash discharge port, 5 is the ash discharge piston, 6 is the control rod, 7 is the guide tube, 8 is the piston pressure cap, 9 is the steel ball, 10 is the ball hole, 11 is the first mounting hole, 12 is the second mounting hole, 13 is the limiting groove, 14 is the limiting screw, 15 is the electronic plug, 16 is the depth adjustment short section, 17 is the lower joint, 18 is the ground controller, 19 is the faucet, 20 is the ash cylinder short section, 21 is the cable, and 22 is the motor. DETAILED DESCRIPTION

[0017] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0018] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The layout is described in detail, such as the positional relationship of top, bottom, left, right, etc. is based on the instructions attached to the manual. Figure 1 It is determined by the layout direction.

[0019] The present invention will be further described below in conjunction with embodiments and drawings:

[0020] As attached Figure 1 , 2 As shown in Figures 3 and 4, the electric slide valve switch control device comprises an ash discharge pup joint 1, a pup joint joint 2, a piston locking mechanism and a control pup joint 3. The lower end of the ash discharge pup joint 1 and the upper end of the control pup joint 3 are connected together through the pup joint joint 2. At least one ash discharge port 4 connected inside and outside is evenly distributed along the circumferential direction in the middle part of the ash discharge pup joint 1. A control rod 6 with an upper end located above the ash discharge port 4 is provided in the pup joint joint 2. An ash discharge piston 5 is clamped on the upper end of the control rod 6 through the piston locking mechanism. A driving device is provided in the control pup joint 3, which can unlock the piston locking mechanism after the control rod 6 is actuated to allow the ash discharge piston 5 to fall.

[0021] According to the requirements, a sealing ring is provided on the outer side of the ash discharge piston 5, which is sealed with the inner side of the ash discharge short section 1. During use, the piston locking mechanism is unlocked after the control rod 6 is actuated by the driving device, and then the ash discharge piston 5 falls freely by its own weight and the weight of cement, and at this time, the cement can flow out from the ash discharge port 4 to perform the ash discharge work.

[0022] The above-mentioned electric slide valve switch control device can be further optimized and / or improved according to actual needs:

[0023] As attached Figure 2 , 3 As shown, the piston locking mechanism includes a guide tube 7, a piston pressure cap 8 and a steel ball 9. The lower end of the control rod 6 is located on the inner side of the short joint 2 and is connected to a driving device capable of moving the control rod 6 up and down. The middle part of the control rod 6 is provided with a guide tube 7 whose lower end is fixedly connected to the short joint 2. At least two ball holes 10 connected inside and outside are symmetrically arranged along the circumferential direction on the upper outer side of the guide tube 7 corresponding to the position above the ash discharge port 4. A limiting steel ball 9 is arranged in the ball hole 10 to abut against the upper outer side of the control rod 6. Each steel ball 9 contacts the lower side of the ash discharge piston 5 after protruding from the ball hole 10. A piston pressure cap 8 is fixed to the upper end of the guide tube 7 corresponding to the position above the ash discharge piston 5.

[0024] According to the requirements, a sealing ring is provided on the outer side of the upper end of the guide tube 7, which is sealed with the inner side of the ash discharge piston 5; a limiting steel ball 9 with a suitable diameter is selected according to the inner diameter of the guide tube 7, so as to prevent the limiting steel ball 9 from being misplaced and falling into the guide tube 7 when it falls back into the guide tube 7, affecting the reuse. During use, the driving device controls the control rod 6 to move downward, and the limiting steel ball 9 loses the restriction of the control rod 6 and falls back into the guide tube 7, so that the ash discharge piston 5 loses the restriction of the limiting steel ball 9 and falls on the upper end of the short joint 2, completing the unlocking of the piston locking mechanism, wherein the piston pressure cap 8 prevents the ash discharge piston 5 from falling off from the upper end of the guide tube 7, playing a limiting role.

[0025] As attached Figure 2 , 3 As shown, the ball hole 10 is a tapered hole with a larger inner portion and a smaller outer portion, and the outer side of the upper portion of the ash discharge piston 5 is a tapered surface with a smaller upper portion and a larger lower portion.

[0026] During use, the ball hole 10 is larger inside and smaller outside, which can prevent the limiting steel ball 9 from falling into the ash discharge short section 1 through the ball hole 10. At the same time, a part of the limiting steel ball 9 can also leak out to limit the ash discharge piston 5.

[0027] As attached Figure 1 , 2 As shown in Figures 3 and 4, the short joint 2 has a first mounting hole 11 and a second mounting hole 12 that are connected in sequence from top to bottom, the inner diameter of the first mounting hole 11 is smaller than the inner diameter of the second mounting hole 12, the inner side of the first mounting hole 11 is fixedly connected to the outer side of the lower end of the guide tube 7, the control rod 6 is in an inverted "T" shape, the upper part of the control rod 6 passes through the second mounting hole 12 and the first mounting hole 11 in sequence and is then sleeved on the inner side of the guide tube 7, at least one limiting groove 13 that is through-through and opens outward is circumferentially spaced apart on the outer side of the lower part of the control rod 6, a screw hole that is connected inside and outside is provided on the outer side of the short joint 2 corresponding to the position of the limiting groove 13, and a limiting screw 14 whose inner end is located in the limiting groove 13 is provided in the screw hole.

[0028] During use, the inner diameter of the first mounting hole 11 is smaller than the inner diameter of the second mounting hole 12. The upper part of the control rod 6 passes through the second mounting hole 12 and the first mounting hole 11 in sequence and is then sleeved on the inner side of the guide tube 7, and the control rod 6 is in an inverted "T" shape. In this way, the lower part of the control rod 6 can only move up and down within the range of the second mounting hole 12. The second mounting hole 12 serves to limit the lower part of the control rod 6. The limiting screw 14 is used in conjunction with the limiting groove 13 to prevent the control rod 6 from rotating axially, so that the control rod 6 always maintains up and down linear motion.

[0029] As attached Figure 1 , 2 As shown in 3, the driving device is a motor 22 which is sealed and fixedly installed in the control short section 3. A threaded hole is provided in the center of the lower end of the control rod 6. The upper end of the output shaft of the motor 22 is inserted into the second mounting hole 12 and then screwed into the threaded hole.

[0030] According to the requirements, the motor 22 is a product of existing known technology, which drives the control rod 6 to move up and down during use.

[0031] As attached Figure 1 As shown, the lower end of the control short section 3 is connected to an electronic plug 15 , the lower end of the electronic plug 15 is connected to a depth adjustment short section 16 , and the lower end of the depth adjustment short section 16 is connected to a lower joint 17 .

[0032] According to the requirements, the electronic plug 15 is a known product. During use, the depth calibration short section 16 can be used to calibrate the depth, thereby judging the depth of the device going down the well, thereby controlling the required ash discharge position.

[0033] As attached Figure 1 As shown, it also includes a faucet 19, an ash cylinder short section 20 and a ground controller 18 for controlling the operation of the driving device. The ground controller 18 is electrically connected to the faucet 19 through a cable 21. At least one ash cylinder short section 20 is connected between the faucet 19 and the ash discharge short section 1 from top to bottom.

[0034] According to the requirements, each adjacent ash cylinder short section 20 can be fixedly connected together through the ash cylinder connection plug, and the ash cylinder connection plug is used to assemble the cable 21 and the ash cylinder short section 20. During use, the ground controller 18 is used to control the operation of the driving device, thereby driving the control rod 6 to move up and down, wherein the ash cylinder short section 20 is used to contain cement, and the ash cylinder short section 20 can be increased according to the required amount of cement.

[0035] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

[0036] The use process of the best embodiment of the present invention is as follows: first, after the faucet 19, the ash cylinder short section 20, the ash discharge short section 1, the control short section 3, the depth adjustment short section 16 and the lower joint 17 are installed and lowered into the well along with the oil pipe, wherein the depth adjustment short section 16 is used for depth adjustment, and the lowering depth position of the device is adjusted according to the depth adjustment result. After the depth of the ash discharge position is determined, the motor 22 is controlled by the ground controller 18 to drive the control rod 6 to move downward, and the limit steel ball 9 falls into the guide tube 7, completing the unlocking of the locking mechanism, and then the ash discharge piston 5 is released. The cement falls down to the upper end of the short joint 2 by its own weight and the weight of cement. At this time, the cement in the ash cylinder short joint 20 can flow out from the ash discharge port 4 to achieve the effect of ash discharge. After the ash discharge is completed, the device is taken out from the well. If a second ash discharge is required, the ash discharge piston 5 can be manually moved to the piston pressure cap 8, and then the driving motor 22 drives the control rod 6 to move upward, so that the limit steel ball 9 moves to the ball hole 10, restricting the free fall of the ash discharge piston 5, connecting the ash cylinder short joint 20 filled with cement, and then going down to the well again to discharge ash. The device is safe, reliable and can be reused.

Claims

1. An electric slide valve switch control device, characterized in that The cam is provided with a locking mechanism for locking the cam, and the locking mechanism has a locking nut for locking the cam in place when the cam is in a position above the cam.

2. The electric slide valve switch control device according to claim 1, characterized in that The ball hole is a tapered hole that is larger inside and smaller outside, and the outer side of the upper part of the ash discharge piston is a tapered surface that is smaller on the top and larger on the bottom.

3. The electric slide valve switch control device according to claim 1 or 2, characterized in that The short section joint is provided with a first mounting hole and a second mounting hole which are connected in sequence from top to bottom, the inner diameter of the first mounting hole is smaller than the inner diameter of the second mounting hole, the inner side of the first mounting hole is fixedly connected to the outer side of the lower end of the guide tube, the control rod is in an inverted "T" shape, the upper part of the control rod passes through the second mounting hole and the first mounting hole in sequence and is then sleeved on the inner side of the guide tube, at least one limiting groove which passes through the upper and lower parts and opens outward is circumferentially spaced apart on the outer side of the lower part of the control rod, a screw hole which is connected inwardly and outwardly is provided on the outer side of the short section joint corresponding to the position of the limiting groove, a limiting screw whose inner end is located in the limiting groove is provided in the screw hole.

4. The electric slide valve switch control device according to claim 3, characterized in that The driving device is a motor with a lower sealed fixed installation in the control short section. A threaded hole is arranged in the center of the lower end of the control rod. The upper end of the output shaft of the motor penetrates into the second installation hole and is screwed into the threaded hole.

5. The electric slide valve switch control device according to claim 1, 2 or 4, characterized in that The lower end of the control short section is connected with an electronic plug, the lower end of the electronic plug is connected with a depth adjustment short section, and the lower end of the depth adjustment short section is connected with a lower joint.

6. The electric slide valve switch control device according to claim 3, characterized in that The lower end of the control short section is connected with an electronic plug, the lower end of the electronic plug is connected with a depth adjustment short section, and the lower end of the depth adjustment short section is connected with a lower joint.

7. The electric slide valve switch control device according to claim 1, 2, 4 or 6, characterized in that It also includes a faucet, an ash cylinder short section and a ground controller for controlling the operation of the driving device. The ground controller is electrically connected to the faucet through a cable. At least one ash cylinder short section is connected between the faucet and the ash discharge short section from top to bottom.

8. The electric slide valve switch control device according to claim 3, characterized in that It also includes a faucet, an ash cylinder short section and a ground controller for controlling the operation of the driving device. The ground controller is electrically connected to the faucet through a cable. At least one ash cylinder short section is connected between the faucet and the ash discharge short section from top to bottom.

9. The electric slide valve switch control device according to claim 5, characterized in that It also includes a faucet, an ash cylinder short section and a ground controller for controlling the operation of the driving device. The ground controller is electrically connected to the faucet through a cable. At least one ash cylinder short section is connected between the faucet and the ash discharge short section from top to bottom.

Images